Tullavardhana, T., Akkranurakul, P., Ungkitphaiboon, W., & Songtish, D. (2016). Matrix metalloproteinase-9 expression is a marker of aggressive esophageal carcinoma: a meta-analysis. European Journal of Oncology and Environmental Health, 20(1), 5-13. https://mattioli1885journals.com/index.php/EJOEH/article/view/4327